<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<script src="https://code.jquery.com/jquery-3.1.1.min.js"></script>
<title>Insert title here</title>
<script type="text/javascript" src="/js/index.js"></script>
<style type="text/css">
    .edim_div{
        display: inline-block;
        vertical-align:top;
        width: 300px;
        height:100px;
        background-color: #eeeeee;
        margin: 10px 15px;
    }
    .edit_tm{
    margin:10px auto;
    text-align: center;
    display: block;
    width:260px; 
    }
    .edit_select_da{
    margin:10px auto;
    text-align: right;
    }
</style>
</head>
<body>
        <h3 style="text-align: center;">口算题目</h3>
        <div style="margin:0 auto;width:80%;">
         <span>请选择题目数量</span>
         <select id='tm_num' >
            <option value="10">10</option>
            <option value="20" selected="selected">20</option>
            <option value="30">30</option>
            <option value="50">50</option>
            <option value="100">100</option>
            <option value="200">200</option>
        </select>
        
        <span>请选择答题时间</span>
         <select id='tm_time' >
            <option value="10">10分钟</option>
            <option value="15" selected="selected">15分钟</option>
            <option value="20">20分钟</option>
            <option value="30">30分钟</option>
            <option value="60">1小时</option>
            <option value="90">1小时30分钟</option>
            <option value="120">2小时</option>
        </select>
        <button onclick='inittm()'>开始答题</button>
        <span>时间:</span><span>10</span><span>分钟</span>
        </div>
       
        
    <div id='text_div' style="margin:10px auto;width:80%;height:500px; background-color: #fff;">
        <div class="edim_div">
            <span class='edit_tm'>1+1=?</span>
            <div class='edit_select_da'>
            <label><input type='checkbox' name='' onclick='' value='1' />1</label>&ensp;&ensp;
            <label><input type='checkbox' name='' onclick='' value='1' />1</label>&ensp;&ensp;
            <label><input type='checkbox' name='' onclick='' value='1' />1</label>&ensp;&ensp;
            <label><input type='checkbox' name='' onclick='' value='1' />1</label>&ensp;&ensp;
            </div>
        </div>
        <div class="edim_div">
            
        </div>
        <div class="edim_div">
            
        </div>
    </div>
</body>
</html>